221221355333 has 16 divisors (see below), whose sum is σ = 247748155200. Its totient is φ = 195784867200.

The previous prime is 221221355321. The next prime is 221221355339. The reversal of 221221355333 is 333553122122.

It is a cyclic number.

It is not a de Polignac number, because 221221355333 - 2⁶ = 221221355269 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 221221355333.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221221355339) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 314558 + ... + 735791.

It is an arithmetic number, because the mean of its divisors is an integer number (15484259700).

Almost surely, 2^221221355333 is an apocalyptic number.

It is an amenable number.

221221355333 is a deficient number, since it is larger than the sum of its proper divisors (26526799867).

221221355333 is a wasteful number, since it uses less digits than its factorization.

221221355333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1050868.

The product of its digits is 32400, while the sum is 32.

Adding to 221221355333 its reverse (333553122122), we get a palindrome (554774477455).

The spelling of 221221355333 in words is "two hundred twenty-one billion, two hundred twenty-one million, three hundred fifty-five thousand, three hundred thirty-three".